BankAccount

using System;

namespace AccountBalance
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int counter = 0;
            double sum = 0;
            while (counter<n)
            {
                double income = double.Parse(Console.ReadLine());
                if (income<0)
                {
                    Console.WriteLine("Invalid operation!");
                    break;
                }
                Console.WriteLine($"Increase: {income:F2}");
                sum += income;
                counter++;
            }
            Console.WriteLine($"Total: {sum:F2}");

        }
    }
}